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Nucleation, growth, and glass formation in an electron-beam surface-processed Cu47Zr53 alloy

Published online by Cambridge University Press:  31 January 2011

J. S. Huang  and
R. N. Kaufmann
J. S. Huang
Affiliation:
Lawrence Livermore National Laboratory, Livermore, California 94550
R. N. Kaufmann
Affiliation:
Lawrence Livermore National Laboratory, Livermore, California 94550
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Abstract

A Cu47Zr53 alloy was surface processed with a directed-energy electron beam. Optical microscopy, x-ray diffraction, and transmission electron microscopy were used to identify the resolidified phases obtained under systematically varied rapid solidification conditions. The results of the investigation indicate that the underlying bulk substrate always nucleates the growth of a crystalline phase that was identified as a metastable CuZr phase with an ordered bcc (B2) structure. The maximum growth velocity of this phase was determined to be between 0.05 ± 0.02 m/s. This limit was compared under different assumptions to the predictions of a reaction rate growth theory. As the solidification speed increased beyond this limit, the crystalline growth eventually ceased and glass formation occurred in the remaining undercooled liquid under rapid cooling conditions. Crystalline particles also nucleated and grew in the liquid at intermediate cooling rates. These particles had a dendritic morphology and were also a CuZr phase with the B 2 structure.

Type
Articles
Information
Journal of Materials Research , Volume 3 , Issue 2 , April 1988 , pp. 238 - 247
Copyright
Copyright © Materials Research Society 1988

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References

1Luborsky, F. E., Amorphous Metallic Alloys (Butterworths, London, 1983).CrossRefGoogle Scholar
2Moorjani, K. and Coey, J. M. D., Magnetic Glasses (Elsevier, Amsterdam, 1984).Google Scholar
3Masui, K., Yamada, T., and Hisamatsu, Y., J. Met. Finishing Soc. Jpn. 32, 410 (1981).Google Scholar
4Furu, H. and Tanabe, Y., J. Jpn. Inst. Met. 46, 1042 (1982).Google Scholar
5Turnbull, D., Contemp. Phys. 10, 473 (1969).CrossRefGoogle Scholar
6Spaepen, F. and Turnbull, D., Rapidly Quenched Metals II, edited by Grant, H. L. and Giessen, B. C. (Massachusetts Institute of Technology, Boston, 1976), p. 205.Google Scholar
7Aziz, M. A., J. Appl. Phys. 53, 1158 (1982).CrossRefGoogle Scholar
8Massalski, T. B., Rapidly Quenched Metals, edited by Steeb, S. and Warlimont, H. (Elsevier, Amsterdam, 1984), p. 171.Google Scholar
9Lin, C. J., Spaepen, F., and Turnbull, D., Liquid and Amorphous Metals V, edited by Wagner, C. N. J. and Johnson, W. L. (North-Holland, Amsterdam, 1984), p. 767.Google Scholar
10Wallace, R. J. and Kaufmann, E. N., J. Mater. Res. 1, 27 (1986).Google Scholar
11Wallace, R. J., Kaufmann, E. N., and Bell, W. L., J. Mater. Res. 1, 758 (1986); E. N. Kaufmann, R. J. Wallace, K. W. Mahin, C. J. Echer, F. J. Huegel, and C. W. Draper, in the Proceedings of the Symposium on Amorphous Metals and Non-Equilibrium Processing, 5-8 June 1984, edited by M. VonAUmen (Les Editions Des Physique, Les Ulis, France), p. 59.Google Scholar
12Nishi, Y., Morohoshi, T., and Kawakani, M., Rapidly Quenched Metals IV, edited by Masumoto, T. and Suzuki, K. (Japan Institute of Metals, Tokyo, 1981), p. 111.Google Scholar
13Pearson's Handbook of Crystallographic Data for Intermetallic Phases (American Society for Metals, Metals Park, OH, 1985), Vol. 2, p. 2041.Google Scholar
14Vallars, P. and Calvert, L. D., Powder Diffraction File, Inorganic Phases (International Centre for Diffraction Data, Swarthmore, PA, 1984), pp. 24–1165.Google Scholar
15Christian, J. W., Read, T. A., and Wayman, C. A., Intermetallic Compounds, edited by Westbrook, J. H. (Wiley, New York, 1967), p. 428.Google Scholar
16Carvalho, E. M. and Harris, I. R., J. Mater. Sci. 15, 1224 (1980).Google Scholar
17Shapiro, A. B., TOPAZ2D–A Two Dimensional Finite Element Code for Heat Transfer Analysis, Electrostatic, and Magnetostatic Problems, UCID-20824, Lawrence Livermore National Laboratory, Livermore, CA, July 1986.Google Scholar
18Klein, C. A., Appl. Opt. 5, 1922 (1966).CrossRefGoogle Scholar
19Kittel, C., Introduction to Solid State Physics (Wiley, New York, 1971), p. 263.Google Scholar
20Gantmahler, V. F. and Kulesko, G. I., Solid State Commun. 53(3), 267 (1985).Google Scholar
21Huang, J. S. and Kaufmann, E. N., in the Proceedings of the Materials Research Society Symposium on Fundamentals of Beam-Solid Interactions and Transient Thermal Processing, 30 November-5 December 1987, Boston, MA (to be published).Google Scholar
22Uhlmann, D. R., J. Non-Cryst. Solids 7, 337 (1972).Google Scholar
23Saunders, N., Calphad 9(4), 297 (1985).Google Scholar
24Richardson, F. D., Physical Chemistry of Metals in Metallurgy I (Academic, London, 1974), p. 12.Google Scholar
25Ramachandrarao, P., Cantor, B., and Cahn, R. W., J. Mater. Sci. 12, 2488 (1977).Google Scholar
26Saunders, N. and Miodownik, A. P., J. Mater. Res. 1, 38 (1986).Google Scholar
27Nishi, Y., Kayama, N., Kiuchi, S., Suzuki, K., and Masumoto, T., J. Jpn. Inst. Met. 44, 1336 (1980).CrossRefGoogle Scholar
28Reference 24, p. 9.Google Scholar
29Nanis, L. and Bockris, J., J. Chem. Phys. 67, 2865 (1963).CrossRefGoogle Scholar